DALTON TRANSACTIONS
·
2013
·Vol. 42
·期 27
·9852-9861
·
IF 3.806
Yuan Wu,Dongmei Yang,Xiaojiao Kang,Ping'an Ma,Shanshan Huang,Yang Zhang,Chunxia Li,Jun Lin
Multifunctional nanocomposites integrating mesoporous and luminescence properties into a single entity are synthesized via a facile and effective approach. Oleic acid capped β-NaYF4:Ce3+/Tb3+ nanoparticles (NPs) are transferred into aqueous solution by cetyltrimethylammonium bromide (CTAB) surfactants, and further encapsulated with uniform mesoporous silica shell followed by the surface modification with poly(ethylene glycol) (PEG), leading to the formation of water-dispersible and biocompatible core–shell structured β-NaYF4:Ce3+/Tb3+@mSiO2-PEG (denoted as NPs@mSiO2-PEG) nanospheres. The as-synthesized nanospheres show a typical mesoporous structure and a green emission under UV irradiation. Doxorubicin hydrochloride (DOX), a widely used anti-cancer drug, is used as a model drug to evaluate the loading and controlled release behaviors of the NPs@mSiO2-PEG in phosphoric acidic buffer solutions (PBS) at different pH values (pH = 7.4 and 5.0). The composite carriers provide a pH-sensitive drug release pattern and the drug releases faster under lower pH value. The endocytosis process of fluorescein isothiocyanate (FITC)-labelled nanospheres is characterized using flow cytometry and confocal laser scanning microscopy (CLSM) against A549 cells. The in vitro cytotoxic effect against A549 cells of the DOX-loaded carriers is investigated in detail. In addition, the extent of drug release can be monitored by the variation of photoluminescence (PL) intensity of β-NaYF4:Ce3+/Tb3+. Considering the good biocompatibility and pH-dependent drug release pattern, such core–shell structured luminescent NPs@mSiO2-PEG nanospheres have potential applications in controlled drug delivery.
研究领域:
生物材料
·
纳米医学
·
肿瘤学
✓ 已验证
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Meiting Li,Bingxin Yuan,Xiangyang Zheng,Bo Chen,Chi Zhang,Xuejiao Wang,Ji-Guang Li
A series of LaNbO 4 :RE 3+ (RE = Tb and Eu) phosphors were successfully synthesized via a calcination-assisted hydrothermal reaction, where the vital roles of solution pH, calcination temperature and NbO 4 3− /La 3+ molar ratio in phase/morphology evolution of LaNbO 4 nanocrystals were elaborated. It was unambiguously demonstrated that monoclinic LaNbO 4 can be crystallized at solution pH = 8–13 after calcination at 900 °C. With pH = 10 precursor for example, higher calcination temperature led to phase transformation from orthorhombic to monoclinic structure. LaNbO 4 nanoparticles exhibit self-activated broad-band excitations ( 1 A 1 → 1 T 1,2 ) and emissions ( 3 T 2,1 → 1 A 1 ) within the NbO 4 3− ligand. Intriguingly, Tb 3+ /Eu 3+ incorporations allow for phase tailoring and full-visible-spectrum color-tunable luminescence, where the latter benefits from the effective NbO 4 3− → Tb 3+ → Eu 3+ energy transfer. LaNbO 4 :0.01 Tb 3+ ,0.01Eu 3+ phosphor exhibits stronger white-light emission, which gradually drifts to yellowish green at high heating temperature. This phosphor is an attractive candidate for optical thermometers and warm pc-WLED owning to excellent thermal stability, a low correlated color temperature of ∼5694 K and a high color rendering index of ∼90.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2026
·
IF 3.3
Mishal Iftikhar,Sadegh Ghorbanzadeh,Wei Zhang
Tb3+/Gd3+-codoped BiF3 nanoparticles were synthesized via a controlled, room-temperature co-precipitation method to address the critical challenge of low photoluminescence (PL) quantum efficiency in singly Tb3+-doped fluoride phosphors. Structural analysis confirmed a stable cubic phase (Fmm) with successful substitutional doping on Bi3+ sites. At the optimal 5 : 5 mol% Tb : Gd ratio, a quantum yield of 13.5%—a fourfold enhancement over Tb3+-only systems—was achieved. The mechanism of enhancement operates through two complementary, excitation-wavelength-dependent pathways: (I) Under short-UV irradiation (230–260 nm), Gd3+ acts as a sensitizer—harvesting photons via its 8S7/2 → 6IJ/6PJ transitions and transferring energy to Tb3+ via resonance Gd3+ → Tb3+ energy transfer, directly proven by excitation spectroscopy. (II) Under 365 nm excitation—where Tb3+ is the primary absorber and Gd3+ absorbs negligibly—Gd3+ enhances PL efficiency through a complementary crystal field modification mechanism: Gd3+ substitution modifies the local phonon environment around bulk Tb3+ sites, reducing the non-radiative depopulation rate of the 5D4 excited state. This is directly evidenced by time-resolved PL decay showing +65% and +87% elongation of Tb3+ bulk lifetime components (τ2 and τ3) upon co-doping. CIE chromaticity analysis confirms high-purity green emission. These findings provide dual-mechanism characterization of Gd3+/Tb3+ co-doping in BiF3, establishing a rational design framework for Gd3+-enhanced lanthanide phosphors.
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF RARE EARTHS
·
2026
·
IF 9.6
Zhengren Tao,Lingying Xu,Yinghan Wang,Qingdi Liu,Shi Ye
Bulk ceramics of afterglow phosphors are preferred for real applications with applied external stimuli like electric field, force and heat. However, sintering powdered afterglow phosphors with high-temperature-volatile components to bulk form normally leads to deterioration or even loss of persistent luminescence (PersL), such as the case of LiTaO 3 :Tb 3+ . This study adopted a strategy of using nanosized precursors prepared by exfoliation and molten salts methods for the subsequent sintering procedure to form LiTaO 3 :1 mol% Tb 3+ bulk nanoceramics, which show outstanding PersL compared to bulk microceramics with absence of PersL. The dynamics of carriers, including electrons, holes and non-static V Li defects were detailedly investigated in the charging process of the bulk nanoceramics at elevated temperatures. It is found that defects not only act as traps storing and releasing electron-hole carriers, but also function as carriers themselves in the LiTaO 3 :1%Tb 3+ bulk nanoceramics. Temperature-dependent electricity and luminescence verify the hopping process of Li + / V Li above 225 °C . The hopping leads to accelerated release of holes initially captured by V Li and the subsequent non-radiative recombination with electrons from V O . It features an apparent and significant intensity decline during the charging process compared to low temperatures or cases without PersL. The bulk nanoceramics possess a temperature-triggered capability for anti-counterfeiting and information storage. These findings contribute to a strategy to fabricate bulk ceramics which are sensitive to sintering procedure, and provide valuable insights into the underlying mechanisms and the rational design of PersL materials.
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Siping Wang,Zhaoyang Chen,Shala Bi,Zuyang Gao,Houjin Hu,Yi Liu,Bolong Zhang
Developing luminescent materials with lower cost and higher temperature sensitivity can provide more options for achieving precise optical thermometry. Therefore, the Tb 4 O 7 and Eu 2 O 3 co-doped BaO-ZnO-P 2 O 5 -B 2 O 3 glasses for optical thermometry were designed and synthesized using a high-temperature melting and quenching method. Due to the low optical basicity and the formation of defects of the glasses, the coexistence of Eu 2+ and Eu 3+ ions was achieved without the reducing agent. In Eu 2 O 3 doped glasses, the relative content variation of Eu 2+ and Eu 3+ ions was analyzed using high-resolution X-ray photoelectron spectroscopy. Emission spectra and fluorescence lifetimes confirmed the effective energy transfer processes between Eu 2+ and Tb 3+ or Tb 3+ and Eu 3+ , which play critical roles in the tunable white emission properties of the material. In the temperature-dependent fluorescence spectra, Eu 2+ ions exhibit significant thermal quenching behavior, which is key to achieving higher temperature sensitivity in optical thermometry. The Eu 2+ /Tb 3+ /Eu 3+ co-doped glasses were investigated for their optical temperature sensing behavior, utilizing the fluorescence intensity ratio techniques, within the temperature range of 273 K–498 K. The maximum absolute (at 498 K) and relative (at 273 K) sensitivity based on the fluorescence intensity ratio, were observed for Eu 2+ /Eu 3+ pairs were 0.145 K −1 and 1.46 % K −1 , respectively, outperforming the conventional Tb 3+ /Eu 3+ combination. Additionally, no significant fluctuation occurred during the repeated experiment. This work demonstrates that Eu 2+ /Tb 3+ /Eu 3+ co-doped BaO-ZnO-P 2 O 5 -B 2 O 3 glasses could be considered a promising candidate for optical thermometry.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Mengdi Ye,Yongmin Duan,Zhaojing Kuang,Wenyan Zheng,Junjie Zhang
With the advancement of modern optics and information technology, luminescent reversible photochromic transparent glasses have attracted considerable attention due to their potential for multimodal data storage. Cadmium-based glasses exhibit excellent photochromic performance, however, their underlying mechanism remains insufficiently elucidated. In this work, Tb 3+ -doped transparent cadmium glass was fabricated, which underwent a rapid transition from transparent to dark brown within 60 s under 365 nm UV irradiation, and completely recovered to transparency upon thermal treatment at 200 ℃, demonstrating high reversibility and cycling stability. X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) analyses revealed that the photochromism is primarily governed by oxygen-vacancy-related color centers, wherein Cd sites serve as electron-enriched centers while Pb-O environments accommodate localized holes. Their spatially coupled charge compensation stabilizes the color centers and sustains reversibility. On this basis, reversible modulation of Tb 3+ luminescence was achieved, with a maximum emission contrast of 93.9 %. This study clarifies the mechanism of cadmium-based photochromic glass from the perspective of defect-charge compensation and provides insights into the design of multifunctional glasses for optical information storage.
研究领域:
材料科学
·
光学材料
·
光子学
·
固态化学
·
信息存储技术
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2020
·
IF 4.825
Dan Zhang,Xiangting Zhang,Zhengce An,Rujia Dong,Zhan Shi,Yanhua Song,Haifeng Zou
Here, the crystal structure, phase analysis, site occupancy, and luminescence properties of NCMP:Eu2+,Tb3+,Mn2+ have been studied for the first time. Under 335 nm ultraviolet excitation, the NCMP:Eu2+ phosphors show narrow-band blue emission. In addition, we discuss the reason for a continuous red shift for the emission spectra of NCMP:xEu2+ by raising the x value. The efficient ET processes of Eu2+ → Tb3+ and Eu2+ → Mn2+ were investigated by the luminescence spectra and decay curves. The ET efficiencies reach 92.58% at y = 0.15 for NCMP:0.01Eu2+,yTb3+ and 99.85% at z = 0.15 for NCMP:0.01Eu2+,zMn2+ phosphors, respectively. The efficient energy transfer processes greatly improve the quantum efficiency, luminous intensity, and thermal stability. Bright green and red emissions can be realized through changing the related ratio of Eu2+, Tb3+, and Mn2+. In addition, the excellent performance of the prepared white LED lamps utilizing a 385 nm chip combined with our prepared NCMP:Eu2+,Tb3+/Mn2+ phosphors indicates that NCMP:0.01Eu2+,yTb3+ and NCMP:0.01Eu2+,zMn2+ phosphors can be potential green and red phosphors for white LEDs.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Mingxin Zhou,Panlai Li,Xiaoxue Huo,Xue Meng,Hao Suo,Guodong Zhang,Xiaojun Wang,Zhijun Wang
Multimodal luminescence materials exhibiting multiple stimulus responses are highly favored in optical anti-counterfeiting and information encryption applications. However, this static luminescence under fixed stimuli remains vulnerable to replication. The development of dynamic multicolor luminescent materials offers an effective solution, yet integrating multidimensional dynamic luminescence within a single material remains challenge. Here, this work introduces Tb 3+ capture centers into the self-activated luminescent host MgGa 2 O 4 -featuring an alternating layered structure and abundant defects-to construct efficient energy transfer channels. This design enables not only static multicolor luminescence dependent on concentration and interplanar spacing, but also, for the first time, stable dynamic multicolor luminescence modulated by four independent dimensions: excitation wavelength, time, temperature, and pressure. In particular, the time domain reveals dynamic photoluminescence with tunable evolution rates, as well as visible–near-infrared dual-band persistent luminescence. These unique optical properties provide strong potential for advanced anti-counterfeiting and visual temperature/stress sensing. Moreover, this work proposes a 4D coupled dynamic encryption system that integrates self-destruction protection and memory fault-tolerance, thereby greatly reducing the risk of information leakage. Combined experimental and theoretical analyses further elucidate the underlying mechanisms, opening new avenues for the design of multidimensional dynamic multicolor luminescent materials.
研究领域:
材料科学
·
光学材料
·
发光与光子学
·
防伪技术
·
信息安全
·
固态化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2026
·
IF 2.6
Jiaqi Zhang,Zhiyu Qin,Langping Dong,Baiqi Shao,Jingshan Hou,Yongzheng Fang
A novel green-emitting phosphor, Ca2HfSi4O12:Ce3+, Tb3+ (CHSO:Ce3+, Tb3+), was successfully fabricated via a conventional solid-state reaction under high-temperature conditions. The phosphor shows two broad excitation bands (200-400 nm), which can be attributed to the characteristic 4f → 5d electronic transitions of Ce3+ ions. As an efficient sensitizer, Ce3+ transfers absorbed ultraviolet energy to Tb3+ ions, resulting in a strong green luminescence peaking at 543 nm when excited at 330 nm. The optimized composition, CHSO:0.02Ce3+, 0.035Tb3+, exhibits a high internal quantum efficiency (IQE) of 88.65% and an external quantum efficiency (EQE) of 54.0% under 330 nm excitation, together with excellent luminous thermal stability, maintaining 90% of its emission intensity at 393 K. White light-emitting diodes (WLEDs) were assembled using CHSO:Ce3+,Tb3+ in conjunction with a 310 nm UV chip and commercial blue BaMgAl10O17:Eu2+ and red (Ca, Sr)AlSiN3:Eu2+ phosphors, yielding a high color rendering index (Ra = 90.2) and a correlated color temperature of 5157 K. These findings highlight CHSO:Ce3+, Tb3+ as an efficient and thermally stable green phosphor with significant potential for UV-pumped WLED applications.
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Xiaofan Ge,Zuoling Fu
The rational exploration of lanthanide-doped phosphors is of great significance for realizing precise optical temperature sensing and information security applications. Here, triple-wavelength responsive Ba2Ga2GeO7:Er3+ phosphors were synthesized by a solid-state method, and the samples gave highly pure green emissions under 808 and 382 nm excitations. Within the temperature range from 313 to 573 K, the corresponding temperature sensing performance based on the fluorescence intensity ratio was estimated, and the maximum relative sensing sensitivities were determined to be 0.97%, 1.20%, and 1.19% K–1 for the 980, 808, and 382 nm excitations, respectively, indicating the title materials are promising for use in temperature sensors. Furthermore, the introduction of Tb3+ enables the materials to realize down conversion luminescence and long persistent luminescence, which greatly enrich the luminescence phenomena of the samples. Based on the abundant emission modes, novel information encryption strategies of digital displays and binary digital-ASCII multiplex codes are proposed, which provide reliable guidance on advanced visualized information encryption.
研究领域:
材料科学
·
光学传感
·
发光材料
·
信息安全
·
光子学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Qibing Li,Yingying Zhang,Zhijie Wu,Tianhui Wang,Jianbei Qiu,Zhiguo Song,Yongjin Li
In this work, a series of Yb 3+ /Tb 3+ co-doped BiOBr nanosheets were synthesized by a simple solvothermal method, and the effect of Tb 3+ and Yb 3+ doping on the up-conversion (UC) luminescence was investigated. Under the excitation of 980 nm, BiOBr: Yb 3+ /Tb 3+ nanosheets displayed emission bands at 494, 544, 584 and 622 nm arise from transitions 5 D 4 → 7 F J ( J = 6, 5, 4, 3) of Tb 3+ ions, respectively. Furthermore, the concentration dependence of UC luminescence was comprehensively explored, and the BiOBr:15%Yb 3+ /3%Tb 3+ nanosheets exhibited the most outstanding luminescent properties by the cooperative energy transfer. Moreover, the degradation rate of RhB by Yb 3+ /Tb 3+ co-doped BiOBr reaches 98.9% for 30 min under full spectral irradiation, and 51.7% for 5 h under 980 nm irradiation, respectively. This work proves that Yb 3+ /Tb 3+ co-doped BiOBr nanosheets have excellent green UC emission and have potential application in the field of near infrared activated photocatalysts .
研究领域:
材料科学
·
光催化
·
发光材料
·
纳米材料
·
稀土掺杂
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.3
Wenya Lai,Qing Han,Hangqing Xie,Jing Xu,Jiadi Lian,Shiqing Xu
Lanthanide complex crystals represent an important class of scintillation materials; however, their radioluminescence performance remains limited due to a lack of versatile strategies for precise regulation. Here, we develop an organic doping strategy and synthesize a Tb complex (Tb-BDC-OAc) crystal of Tb 3+ coordinated with 1,4-dicarboxybenzene (H 2 BDC) and acetic acid (dopant, OAc - ). After systematic optimization, the Tb-BDC-OAc₂ crystal achieves a photoluminescence quantum yield (PLQY) of up to 96.4 % under 330 nm excitation, which we attribute to improved triplet exciton dynamics that enhance ligand-to-Tb 3+ energy transfer. In contrast, excitation at 368 nm—directly targeting Tb 3+ —yields an even greater PLQY enhancement of 19.1 %, driven by crystal-field perturbation tuning via OAc - doping. This dual mechanism synergistically increases the light yield to 19400 photons MeV −1 while maintaining exceptional stability (99.8 % light yield retention after 30 days in ambient conditions). The crystal’s tailored energy-level alignment and suppressed afterglow (<1 s decay) enable ultrasensitive X-ray detection with a record-low limit of 15.77 nGy s −1 . By decoupling triplet exciton regulation (330 nm excitation) from crystal-field engineering (368/377 nm excitation), this work establishes a paradigm for designing high-efficiency, low-cost scintillators for biomedical imaging and radiation monitoring.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）